Method of and apparatus for applying solutions or fluids to travelling webs.



I No. 780,670

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J @Mv l l -R.KRON. i O METHOD OP ANO APPARATUSOFOR APPLYING SOLUTIONS ORFLUIDS TO TRAVBLINO WEBS.v

APPLICATION FILED AUG. 12, 1904.

PATENTBO JAN, 24, 1905. y

HEETS-BHBET 1.

I PATENTED JAN. 24, 1905. R. KRON. v

SHEETS-SHEET z.

T0 TRAVELING WEBS. APPLIOATION TILBD `um. 12,1904.

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' METHOD OT AND APPARATUS TOR APPLYTNG SOLUTIONS OR PLOIDS UNITED STATESatented January 24, ll 905.

PATENT OFFICE RUDOLF KRON, OF GOLVZERN, GERMANY.

METHOD 0F AND APPARATUS FORLAPPLYING SOLUTIONS 0H FLUlDS-TO TRAVELINGWEBS.

SPECIFICATION forming part of Letters Patent No. 780,670, dated January24, 1905.

i Application filed August l2. 1904. Serial No.'220,465.

To all whom it' Montgeon/cern:

Be it known that I, RUDOLF KRON, acitizen of the Republic ofSwitzerland, and a resident of Golzern, Kingdom of Saxony,German Empire,have invented anew and useful Method of and Apparatus for ApplyingSolutions or Fluids to Traveling Webs, of which the following is aspecification.

Various methods are at present employed in the manufacture of compoundor multiple papers or boards for successively running the same ordiii'erent stuff? solutions or pulps upon a continuously-traveling web;but the feed-regulatorsand distributing devices hitherto employed forthis purpose work so im-r perfectly that while they permit of makingcoarse duplex papers and boards finer layers or coats, especially ofless easily distributed solutions or iuids, can either not be appliedwith them at all or at best only very unevenly.

The present invention consists of an improved method and apparatus foruniformly iiowing and distributing Celluloid, casein, glue, earths,color, rubber,and like solutions or fluids upon paper, woven materials,and the likefor example, for the immediate production of chromo-paperand sized or coated cardboard on the paper-making machine.

This process consists as follows:

1. First of all the solution flowing trans- Versely onto the web ispermitted to distribute itself evenly and regularly the entire' width ofthe web and to compose itself upon a broad surface before it is pouredonto the continuously-traveling web to vbe coated on one side.

2. vA slowly-increasing longitudinal iiow is imparted to theproperly-distributed solution, which at the outlet or flowing pointattains exactly the speed of the continuously-traveling web to be coatedon one side.

3. The thickness or depth of the outiiowing stream can be varied asdesired at any point.

4. Any foam or air-bubbles produced are at once removed in the known wayby a spray or rain of atomized water.

For carrying this process into practical effect I have devisedarrangements for effecting the feed or supply of the ifuid, fordistributing it, and for iiowing it upon the web or thelike, whicharrangements are illustrated in the accompanying drawings.

Figure 1 shows this apparatus in cross-sec tion, andFig. 2 is a plan,while Figs. 3, 4,5, and 6 are views of various details.

At the head of the apparatus is disposed a trough a, divided into twovcompartments. The iiuid to be distributed is supplied to the firstofthese compartments at both sides from above o r below or from thetransverse side. In Figs. 1, 2, and 3 the iiuid is admitted to the iirstcompartment from below by the supply-pipe m, a reciprocating or rotarystirrer r being arranged in this compartment. From the rst compartmentthe liquid passes into the second compartment through a number ofsluice-like openings disposed close together and adapted to be closed orthrottled by adjustable slides or valves c. The second compartmentterminates in an overflow or lip d. To the overflow Z is connected awide fiat distributing-box s,with an elasticor resilient bottom, thisbox being suspended from two angle bars or rails e. At the bottom of thebox s are an umber of obstructions f, serving to compose the liquid. Thelast of these obstructions is formed as a Weir-like overiiow or lip insuch manner that the liquid can flow out without shock onto the web tobe coated on one side, which travels continuously under this lip closeunder the box in the direction of the arrow OD.

By means of the suspending-screws g the elastic bottom of the box s canbe set up or down in such manner that the liquid is distributed evenlyand regularly over the Whole width. Further, the whole box s can begiven more or less inclination or fall by means of the ladjusting-screwsL, so that the fluid reaches the point of delivery or outiiow at theproper speed. As further means of regulating the outflow over the entirewidth doctors or strickles z' are provided at desired points, theseconsisting of a strong'or resisting body in which are fitted metaltongues n. These metal tongues can, as seen from the left in Fig. 4i andin longitudinal and cross-section, Figs. 5 and 6, be put in tension byadjusting-screws o, disposed close to each other in such man- IOO ner asto impart a flat,'concave, convex, or undulated form to the bottom edgeof the doctor-blades. By these adjustments the solution is fed to theoutow or flowing point at a gradually-increasing speed, attaining at theoutflow a speed corresponding with the speed of the web. To enable themetal tongues to bend in the manner mentioned, it is necessary toprovide them with notches, slots, or gaps at the top.

In order to disperse foam and air-bubbles, a fine spray or mist isproduced in the known way abovethe trough ct and the box s. In thepresent case this is effected 'by allowing the fine jets of one or morespraying-pipes to strike against plates z5, arranged above said jets,whereby the jets are atomized and fall back as a fine mist or rain,which causes any foam or air-bubbles produced in the fluid to burst.

It may be preferable to produce a transverse shaking or vibrating motionof the suspended distributing-box@ s. For this purpose one of theadjusting-screws 7a may be provided at its lower end with a roller w, asshown at the right-hand side of Fig. 4. The pin of a crankdisk a isconnected by a connecting-rod o with the pin or trunnion of the rollerw, so that on rotating the crank-disk 'it a to-and-fro movement is givento the distributing-box p The roller w is supported on the stationarysurface m, whereas the adjusting screw or screws /t on the left-handside of the distributing-box move on the stationary surface or plate Asimilar means for producing the transverse shaking of thedistributing-box may be applied in connection with the adjusting-screwon the other side of the box.

The operation of the apparatus is apparent from the above description.It only needs to be added that one and the same distributing arrangementcan be arranged or adapted for varying widths of web, so that theoutflow of the fluid will take place over a portion of the width of thetraveling web or in separate or distinct strips or parts of the wid th.For this purpose it suflices to throttle or reduce the width of theoutflow by means of two horizontally-adjustable slides Z, or the sideparts or members p can be made adjustable in width or breadthwise. Bydisposing a number of the described distributing apparatus one behindthe other or side by side different solutions or fluids can be flowed orapplied side by side or behind or upon each other.

What I claim is*- l. Method for uniformly flowing or applying solutionsor fiuids upon a continuouslytraveling web or surface to be coated withsame on one side, characterized in that the solutions or fluids are fedto the outflow or "flowing point with a gradually-increasilxg speed,attaining at the outlet to the speed of the web or surface to be coated,the thickness or depth ofthe outliowing stream being varied as desiredat any point of the outflow of liquid, while any foam or air-bubblesproduced are dispersed by a spray falling upon the stream of the liquid,substantially as described and specified.

2. In an apparatus for carrying ont the method for uniformly flowing orapplying solutions or fluids on a continuously-traveling web or surface,the combination with a supplytrough divided into two compartments whichcommunicate with each other by a number of openings provided with slidesor valves and the second of which compartments is provided with anoverflow, of a suspended distributingbOX having an elastic bottom whichis previded with obstructions and adjusting-screws for regulating theflow of material, doctors or strickles with adjustable resilient bladesfor the uniform distribution of the material, and spraying-pipes forobviating the formation of foam and air-bubbles, substantially asdescribed and specified.

3. In an apparatus for effecting the iiow of fluids on acontin'uously-traveling web or surface, the combination with asupply-trough and a suspended distribution-box having an elastic bottom,of a crank-disk, a connectingrod, a roller provided at the lower end ofthe adjusting-screw and a supporting-plate at the side of thedistributing-box for producing a shaking or vibrating motion of thedistributing-box, substantially as described and specified.

In testimony that I claim the foregoing as my invention l have signed myname, in preslence of two witnesses, this 30th day of July,

RUDOLF KHON. Witnesses:

O'r'ro H. KNoor, GEORG HnUssINeER.

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